声象一体化仿真

INTEGRATED VISUAL AND AUDITORY RENDERING

在现有计算机图形学技术和数字声音模拟技术的基础上，本文提出了基于同一物理模型的三维声象一体化仿真的思想．声象一体化是指，观众在面对屏幕上显示的三维厅堂图象的同时，能听到所在位置上的实际声音．在分析光与声传播相似性和差异的基础上，将时间因素与传统的辐射度算法相结合，提出了一种既适用于视觉再现、又适用于听觉再现的声象一体化生成统一算法，并将其应用到建筑声学领域和虚拟现实环境中．通过分析实验数据，揭示了声音能量在时间和空间分布上的特性．从本质上说，声象一体化是迈向仿真真实世界的一大步，是实现视听多媒体系统的一个重要环节．

With existing techniques developed in computer graphics and digitalsound processing, a concept of integrated visual and auditory rendering based ongeneral physical model is presented in this paper. Integrated visual and auditoryrendering means a viewer can look at the 3D images of an auditorium on the screen,while hearing a sound which imitates the viewer's situation exactly. Based on somekinds of similarity and difference between the propagation nature of light andsound, time factor is merged into traditional radiosity algorithm. The time-relatedradiosity algorithm is a general method for both visual rendering and auditory ren dering, which is suitable for architecture acoustics and virtual environment. Analy sis based on experimental results shows some spatial and temporal features aboutsound energy distribution. In essence, integrated visual and auditory rendering is abig step to simulate real world,and to construct multimedia computing systems.